diff --git a/docs/releases/3.1.txt b/docs/releases/3.1.txt
index db090de3f6..f44bef411d 100644
--- a/docs/releases/3.1.txt
+++ b/docs/releases/3.1.txt
@@ -109,9 +109,9 @@ reset tokens in the admin site, user sessions, and signatures created by
 Support for SHA-256 was added in Django 3.1. If you are upgrading multiple
 instances of the same project to Django 3.1, you should set
 :setting:`DEFAULT_HASHING_ALGORITHM` to ``'sha1'`` during the transition, in
-order to allow compatibility with the older versions of Django. Once the
-transition to 3.1 is complete you can stop overriding
-:setting:`DEFAULT_HASHING_ALGORITHM`.
+order to allow compatibility with the older versions of Django. Note that this
+requires Django 3.1.1+. Once the transition to 3.1 is complete you can stop
+overriding :setting:`DEFAULT_HASHING_ALGORITHM`.
 
 This setting is deprecated as of this release, because support for tokens,
 cookies, sessions, and signatures that use SHA-1 algorithm will be removed in